While she told reporters, "this isn't a campaign bus," Palin admitted she is "still kind of contemplating" a run for president in 2012. "I think Americans are ready for true change," she said, adding that the GOP field "is not set yet - not by a long shot."

"The road trip was designed as a test run to find out whether she can execute a decidedly unconventional campaign game plan," writes RealClearPolitics' Scott Conroy.

Fox News reporter Carl Cameron suggests the other candidates should be concerned. "Any Republican who doesn’t have a healthy respect for Palin’s ability to actually be a game-changer in the 2012 GOP nominating race risks being run over," writes Cameron.

A Republican presidential primary debate is scheduled for June 13 in New Hampshire.

What do you think - will Sarah Palin run for president in 2012? Would you like to see her enter the race? Leave your comments below.